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首页> 外文期刊>Applied Surface Science >Study on tribological behavior and cutting performance of CVD diamond and DLC films on Co-cemented tungsten carbide substrates
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Study on tribological behavior and cutting performance of CVD diamond and DLC films on Co-cemented tungsten carbide substrates

机译：共水泥碳化钨基体上CVD金刚石和DLC膜的摩擦学行为和切削性能的研究

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摘要

The tribological behaviors of diamond and diamond-like carbon (DLC) films play a major role on their machining and mechanical applications. In this study, diamond and diamond-like carbon (DLC) films are deposited on the cobalt cemented tungsten carbide (WC-Co) substrate respectively adopting the hot filament chemical vapor deposition (HFCVD) technique and the vacuum arc discharge with a graphite cathode, and their friction properties are evaluated on a reciprocating ball-on-plate tribometer with counterfaces of silicon nitride (Si_3N_4) ceramic, cemented tungsten carbide (WC) and ball-bearing steel materials, under the ambient air without lubricating condition. Moreover, to evaluate their cutting performance, comparative turning tests are conducted using the uncoated WC-Co and as-fabricated CVD diamond and DLC coated inserts, with glass fiber reinforced plastics (GFRP) composite materials as the workpiece. The as-deposited HFCVD diamond and DLC films are characterized with energy-dispersive X-ray spectroscopy (EDX), scanning electron microscope (SEM), X-ray diffraction spectroscopy (XRD), Raman spectroscopy and 3D surface topography based on white-light interferometry. Furthermore, Rocwell C indentation tests are conducted to evaluate the adhesion of HFCVD diamond and DLC films grown onto WC-Co substrates. SEM and 3D surface topography based on white-light interferometry are also used to investigate the worn region on the surfaces of diamond and DLC films. The friction tests suggest that the obtained friction coefficient curves that of various contacts exhibit similar evolution tendency. For a given counterface, DLC films present lower stable friction coefficients than HFCVD diamond films under the same sliding conditions. The cutting tests results indicate that flank wear of the HFCVD diamond coated insert is lower than that of DLC coated insert before diamond films peeling off.
机译：金刚石和类金刚石碳（DLC）膜的摩擦学行为在其机加工和机械应用中起着重要作用。在这项研究中，分别采用热丝化学气相沉积（HFCVD）技术和带有石墨阴极的真空电弧放电技术，将金刚石和类金刚石碳（DLC）膜沉积在钴硬质合金碳化钨（WC-Co）基底上，并在具有润滑条件的环境空气下，在带有氮化硅（Si_3N_4）陶瓷，硬质合金碳化钨（WC）和滚珠轴承钢材料的对置面的往复式球磨机上评估其摩擦性能。此外，为了评估其切削性能，使用未涂层的WC-Co和已加工的CVD金刚石和DLC涂层的刀片，以玻璃纤维增​​强塑料（GFRP）复合材料为工件，进行了对比车削测试。沉积的HFCVD金刚石和DLC膜具有能量色散X射线光谱（EDX），扫描电子显微镜（SEM），X射线衍射光谱（XRD），拉曼光谱和基于白光的3D表面形貌干涉仪。此外，进行了Rocwell C压痕测试，以评估生长在WC-Co基材上的HFCVD金刚石和DLC膜的附着力。基于白光干涉法的SEM和3D表面形貌也用于研究金刚石和DLC膜表面的磨损区域。摩擦试验表明，所获得的各种接触的摩擦系数曲线表现出相似的演变趋势。对于给定的相对表面，在相同的滑动条件下，DLC膜的稳定摩擦系数比HFCVD金刚石膜低。切削测试结果表明，在金刚石膜剥落之前，HFCVD金刚石涂层刀片的侧面磨损低于DLC涂层刀片的侧面磨损。

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